CN101711087B - Fluorescent lamp dimming drive device and dimming method therefor - Google Patents
Fluorescent lamp dimming drive device and dimming method therefor Download PDFInfo
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- CN101711087B CN101711087B CN 200910310371 CN200910310371A CN101711087B CN 101711087 B CN101711087 B CN 101711087B CN 200910310371 CN200910310371 CN 200910310371 CN 200910310371 A CN200910310371 A CN 200910310371A CN 101711087 B CN101711087 B CN 101711087B
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Abstract
The invention discloses a fluorescent lamp dimming drive device, which comprises an annular transformer, wherein the annular transformer consists of an annular magnetic core and an inductance coil wound on the annular magnetic core; the annular transformer is arranged in and coupled with a magnetic yoke; and an excitation coil is wound on the magnetic yoke. A dimming method allows the inductive reactance of a choking inductor to change with the frequency of oscillation current flowing past by changing the frequency of the oscillation current produced by a ballast so as to change the working current and power of a lamp tube and realize dimming. The dimming method is characterized in that the method allows the amount of the inductance of the inductance coil on the annular magnetic core by changing magnetic flux in the annular magnetic core of the annular transformer in a self-excited oscillator so as to change the oscillation frequency of the self-excited oscillator and then change the frequency of the oscillation current produced by the ballast. The fluorescent lamp dimming drive device has the advantages of simple structure and low cost, and the dimming method is simple, effective and capable of promoting the popularization of dimming fluorescent lamps.
Description
Technical field
The present invention relates to the lighting apparatus field, especially a kind of fluorescent lamp dimming drive device and light-dimming method thereof.
Background technology
Along with the development of science and technology, the use of fluorescent lamp (such as fluorescent lamp, electricity-saving lamp etc.) in productive life is more and more wider, and the characteristics of its efficient energy-saving are well received by consumers.At present, in the lighting apparatus field, incandescent lamp can by the adjusting of the elements such as dimmer switch to its operating voltage, electric current, realize that different illumination intensity is to satisfy the needs of different productive lifes.Fluorescent lamp is because in self structure, difference on the principle of luminosity, so that existing fluorescent lamp all can not carry out brightness regulation simply as incandescent lamp, in order to realize light modulation, must in circuit of fluorescent lamp electronic ballast, adopt the special chip group to realize dimming function, because the monopolization of technology, drive circuit is complicated, the factors such as manufacture process requirement is high, so that the glow discharge spot lamp of most of tunable optical in the market (fluorescent lamp) all adopts external application-specific integrated circuit (ASIC) to realize dimming function, cost is very high to be unfavorable for popularizing in illumination market, therefore people expect a kind of effectively simple always, fluorescent lamp dimming drive device with low cost and light-dimming method thereof, can make fluorescent-lamp ballast circuit possess good dimming function, avoid the series of problems that in the past must adopt external special chip group to bring.
Summary of the invention
The objective of the invention is to provide for the deficiency that solves above-mentioned technology a kind of simple in structure, can make fluorescent-lamp ballast circuit possess fluorescent lamp dimming drive device and the light-dimming method thereof of good dimming function.
In order to achieve the above object, the fluorescent lamp dimming drive device that the present invention is designed, it comprises toroidal transformer, inductance coil on toroidal core forms described toroidal transformer by toroidal core and winding, described toroidal transformer is arranged in the yoke, and be coupled with it, be wound with magnet exciting coil on the yoke.During electric current in changing magnet exciting coil, the magnetic flux in the yoke produces corresponding variation thereupon, because toroidal transformer is coupled with yoke, so the magnetic flux in its toroidal core also changes thereupon, thus the inductance value on the change inductance coil.
The core of existing fluorescent-lamp ballast circuit is self-excited oscillator, and toroidal transformer is the indispensable electric component of self-excited oscillator starting of oscillation, and the inductance value of inductance coil directly affects the frequency of oscillation of self-excited oscillator on the while toroidal transformer.When the ballast driven fluorescent lamp operation, can change the inductance value of inductance coil by changing electric current in the magnet exciting coil, the frequency of oscillation of self-excited oscillator is changed, thereby utilize existing frequency modulation light regulating technology can realize the light modulation of fluorescent lamp.
The winding of described inductance coil sectional is preferably three sections or four sections on toroidal core, also can be to intercept different sections on the same coil and draw pin, makes different inductance.
Described toroidal transformer is preferably the ferrite core shape transformer, and the ferrite core shape transformer is used wider in the ballast self-excited oscillator, uses the ferrite core shape transformer can increase the versatility of fluorescent lamp dimming drive device and light-dimming method thereof.
More convenient in order to use, increase versatility, this fluorescent lamp dimming drive device also can comprise self-excited oscillator, be provided with the switching tube of two alternate conduction in the described self-excited oscillator, the circuit of technology self-excited oscillator is varied now, the switching tube of two alternate conduction is the requisite parts of self-excited oscillator vibration, two switching tubes can be connected with the inductance coil of winding on toroidal core respectively, because self-excited oscillator is the core component in the rectifier circuit, with self-excited oscillator and yoke, magnet exciting coil is made of one, but well in advance debugging, reserve the work pin that is connected with external circuit, make this fluorescent lamp dimming drive device and light-dimming method thereof energy working properly, can be directly used in the rectifier circuit easily in addition.
Preferred scheme is that described switching tube is triode Q1 and the Q2 of two alternate conduction, described inductance coil divides three sections windings to form inductance L 1 at toroidal core, L2, L3, the base stage of triode Q1 is connected with inductance L 1 by resistance R 5, the other end of inductance L 1 is connected by the emitter of resistance R 3 with triode Q1, the base stage of triode Q2 is connected with inductance L 2 by resistance R 6, the other end of inductance L 2 is connected by the emitter of resistance R 4 with triode Q2, one end while and the resistance R 3 of inductance L 3, the collector electrode of triode Q2 is connected, and the other end is used for connecting choke induction and fluorescent tube.
For further increasing versatility, described self-excited oscillator can be connected with rectification unit, and rectification unit is the self-excited oscillator power supply.
Can make things convenient for light modulation, described magnet exciting coil can be connected with the adjustable DC power supply, adjustable DC power supply and magnet exciting coil support the use, and can increase result of use, make light modulation more convenient, accurate.
The light-dimming method of the above-mentioned fluorescent lamp dimming drive device that the present invention is designed, it adopts the frequency of the oscillating current that changes the ballast generation, so that the induction reactance of choke induction changes along with the frequency of the oscillating current that flows through, thereby the operating current and the power that change fluorescent tube are realized light modulation, it is characterized in that: by the magnetic flux in the toroidal core that changes toroidal transformer in the self-excited oscillator, so that the inductance value of inductance coil produces respective change on the toroidal core, thereby change the frequency of oscillation of self-excited oscillator, realize the change of the oscillating current frequency that ballast produces.
The preferred method of inductance value that changes inductance coil on the toroidal core is by yoke and magnet exciting coil coupling with toroidal transformer, by changing the magnetic flux in the electric current change yoke in the magnet exciting coil, so that the magnetic flux in the toroidal core of toroidal transformer changes, thereby the inductance value that causes inductance coil on the toroidal core produces respective change.
The resulting fluorescent lamp dimming drive device of the present invention is simple in structure, with low cost, its light-dimming method is simply effective, electric ballast frequency modulation light modulation principle in conjunction with external multichip integrated circuit (IC) composition of researching and developing, change the frequency of oscillation of regulating self-excited oscillator in the fluorescent lamp ballast by the electric current that changes magnet exciting coil, thereby realize the light modulation of fluorescent lamp, avoid the series of problems that in the past must adopt external special chip group to bring, for the light modulation of fluorescent lamp has been made contribution at lighting field universal.
Description of drawings
Fig. 1 is the front view of embodiment 1 fluorescent lamp dimming drive device;
Fig. 2 is the end view of embodiment 1 fluorescent lamp dimming drive device;
Fig. 3 is the circuit of electronic ballast schematic diagram that comprises the fluorescent lamp dimming drive device of embodiment 1;
Fig. 4 is the structural representation of embodiment 2 fluorescent lamp dimming drive devices;
Fig. 5 is the structural representation of embodiment 3 fluorescent lamp dimming drive devices.
Embodiment
The invention will be further described by reference to the accompanying drawings below by embodiment.
As shown in Figure 1, 2, the described fluorescent lamp dimming drive device of present embodiment, it comprises ferrite core shape transformer 1, inductance coil 3 on toroidal core 2 forms described toroidal transformer 1 by toroidal core 2 and winding, the three sections windings in 3 minutes of this inductance coil form inductance L 1, L2, L3 thus on toroidal core 2, described toroidal transformer 1 is arranged in the yoke 4, and be coupled with it, be wound with magnet exciting coil 5 on the yoke 4.This fluorescent lamp dimming drive device and light-dimming method thereof are used for electronic ballast for fluoresent lamp, as shown in Figure 3, circuit of fluorescent lamp electronic ballast comprises rectification circuit and self-excited oscillator, comprise above-mentioned ferrite core shape transformer 1 in the self-excited oscillator, rectification circuit is comprised of diode D1-D4, self-excited oscillator comprises triode Q1 and the Q2 of two alternate conduction, the base stage of triode Q1 is connected with inductance L 1 on the ferrite core shape transformer 1 by resistance R 5, the other end of inductance L 1 is connected by the emitter of resistance R 3 with triode Q1, the base stage of triode Q2 is connected with inductance L 2 by resistance R 6, the other end of inductance L 2 is connected by the emitter of resistance R 4 with triode Q2, one end while and the resistance R 3 of inductance L 3, the collector electrode of triode Q2 is connected, and the other end is connected with fluorescent tube 8 by choke induction L4; Two pins of magnet exciting coil 5 are connected with the DC power supply 6 of 0-10V.
The light-dimming method of above-mentioned fluorescent lamp dimming drive device, it adopts the frequency of the oscillating current that changes the ballast generation, so that the induction reactance of choke induction changes along with the frequency of the oscillating current that flows through, thereby the operating current and the power that change fluorescent tube 8 are realized light modulation, it is characterized in that: by the magnetic flux in the toroidal core 2 that changes toroidal transformer 1 in the self-excited oscillator, so that the inductance value of inductance coil 3 produces respective change on the toroidal core 2, thereby change the frequency of oscillation of self-excited oscillator, realize the change of the oscillating current frequency that ballast produces.The inductance value method that changes inductance coil 3 on the toroidal core 2 is by yoke 4 and magnet exciting coil 5 couplings with toroidal transformer 1, by changing the magnetic flux in the magnet exciting coil 5 interior electric currents change yokes 4, so that the magnetic flux in the toroidal core 2 of toroidal transformer 1 change, thereby the inductance value that causes inductance coil 3 on the toroidal core 2 produces respective change.
When work, by changing the output voltage of 0-10V DC power supply 6, can change the electric current in the magnet exciting coil 5, thereby so that the magnetic flux in the yoke 4 produces corresponding variation thereupon, because toroidal transformer 1 is coupled with yoke 4, therefore the magnetic flux in its toroidal core 2 also changes thereupon, thereby change the inductance value on the inductance coil 3, the frequency of oscillation of self-excited oscillator is changed, consequently flow through the electric current of a frequency change at choke induction L4, choke induction L4 inductance produces different induction reactance with the variation of frequency, thereby change so that flow through the size of current of fluorescent tube 8, change so the power that obtains at fluorescent tube 8 is the variation with frequency, can be in harmonious proportion energy-conservation purpose so reached brightness.
The operation principle of the described circuit of fluorescent lamp electronic ballast of present embodiment is the routine techniques of electronic applications, and this field those of ordinary skill can be implemented according to Fig. 2.
As shown in Figure 4, the described fluorescent lamp dimming drive device of present embodiment and light-dimming method thereof, also comprise as different from Example 1 self-excited oscillator 7, be provided with the switching tube 9 of two alternate conduction in the described self-excited oscillator 7, two switching tubes 9 are connected with the inductance coil of winding on toroidal core respectively, because self-excited oscillator 7 is the core components in the rectifier circuit, with self-excited oscillator 7 and yoke, magnet exciting coil is made of one, but well in advance debugging, reserve the work pin that is connected with external circuit, make this fluorescent lamp dimming drive device and light-dimming method thereof energy working properly, can be directly used in the rectifier circuit easily in addition.Magnet exciting coil is connected with the adjustable DC power supply 6 of 0-5V.
As shown in Figure 5, the described fluorescent lamp dimming drive device of present embodiment and light-dimming method thereof also comprise rectification unit 10 as different from Example 2, and rectification unit 10 is converted into direct current with alternating current, and are self-excited oscillator 7 power supplies.
Claims (6)
1. fluorescent lamp dimming drive device, it comprises toroidal transformer, and the inductance coil on toroidal core forms described toroidal transformer by toroidal core and winding, it is characterized in that described toroidal transformer is arranged in the yoke, and be coupled with it, be wound with magnet exciting coil on the yoke; Described inductance coil segmentation winding is on toroidal core; Comprise self-excited oscillator, be provided with the switching tube of two alternate conduction in the described self-excited oscillator, two switching tubes are connected with the inductance coil of winding on toroidal core respectively.
2. described fluorescent lamp dimming drive device according to claim 1, it is characterized in that described switching tube is triode Q1 and the Q2 of two alternate conduction, described inductance coil divides three sections windings to form inductance L 1 at toroidal core, L2, L3, the base stage of triode Q1 is connected with inductance L 1 by resistance R 5, the other end of inductance L 1 is connected by the emitter of resistance R 3 with triode Q1, the base stage of triode Q2 is connected with inductance L 2 by resistance R 6, the other end of inductance L 2 is connected by the emitter of resistance R 4 with triode Q2, one end while and the resistance R 3 of inductance L 3, the collector electrode of triode Q2 is connected, and the other end is used for connecting choke induction and fluorescent tube.
3. described fluorescent lamp dimming drive device according to claim 2 is characterized in that described self-excited oscillator is connected with rectification unit, and rectification unit is the self-excited oscillator power supply.
4. according to claim 1 and 2 or 3 described fluorescent lamp dimming drive devices, it is characterized in that described magnet exciting coil is connected with the adjustable DC power supply.
5. light-dimming method of fluorescent lamp dimming drive device as claimed in claim 1, it adopts the frequency of the oscillating current that changes the ballast generation, so that the induction reactance of choke induction changes along with the frequency of the oscillating current that flows through, thereby the operating current and the power that change fluorescent tube are realized light modulation, it is characterized in that: by the magnetic flux in the toroidal core that changes toroidal transformer in the self-excited oscillator, so that the inductance value of inductance coil produces respective change on the toroidal core, thereby change the frequency of oscillation of self-excited oscillator, realize the change of the oscillating current frequency that ballast produces.
6. the light-dimming method of described fluorescent lamp dimming drive device according to claim 5, it is characterized in that toroidal transformer by yoke and magnet exciting coil coupling, by changing the magnetic flux in the electric current change yoke in the magnet exciting coil, so that the magnetic flux in the toroidal core of toroidal transformer changes, thereby the inductance value that causes inductance coil on the toroidal core produces respective change.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910310371 CN101711087B (en) | 2009-11-25 | 2009-11-25 | Fluorescent lamp dimming drive device and dimming method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910310371 CN101711087B (en) | 2009-11-25 | 2009-11-25 | Fluorescent lamp dimming drive device and dimming method therefor |
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| Publication Number | Publication Date |
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| CN101711087A CN101711087A (en) | 2010-05-19 |
| CN101711087B true CN101711087B (en) | 2013-03-13 |
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| CN 200910310371 Expired - Fee Related CN101711087B (en) | 2009-11-25 | 2009-11-25 | Fluorescent lamp dimming drive device and dimming method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103702500A (en) * | 2013-12-10 | 2014-04-02 | 杭州鸿雁东贝光电科技有限公司 | Power control circuit for ballast of fluorescent lamp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2421798Y (en) * | 2000-04-04 | 2001-02-28 | 张波 | Brightness regulator for fluorescent lamp |
| CN2478310Y (en) * | 2001-04-23 | 2002-02-20 | 沈阳佳生保健科技有限公司 | Brightness regulatable non-stroboflash fluorescent lamp |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2421798Y (en) * | 2000-04-04 | 2001-02-28 | 张波 | Brightness regulator for fluorescent lamp |
| CN2478310Y (en) * | 2001-04-23 | 2002-02-20 | 沈阳佳生保健科技有限公司 | Brightness regulatable non-stroboflash fluorescent lamp |
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| CN101711087A (en) | 2010-05-19 |
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Granted publication date: 20130313 Termination date: 20131125 |